Harrow.



No. 807,842. PATENTED DEC. 12, 1905. W. M. WILLMORE- & W. L. SCHMIDT.

HARROW.

APPLICATION FILED AUG. 22. 1905.

I I William/M.

mzzmom akfozwu iamliouisSchmz'dt WILLIAM M. WILLMORE AND UNITED STATESPATENT OFFICE.

HARROW.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed August 22, 1905. Serial No. 275,263-

To all whom it may concern:

Be it known that we, WILLIAM M. WILL- MORE and WILLIAM LoUIs SCHMIDT,citizens of the United States, residing at Vincennes, in the county ofKnox and State of Indiana, have invented new and useful Improvements inHarrows, of which the following is a specification.

This invention relates to harrows of the type having rotarytooth-carrying bars, and has for its objects to produce a comparativelysimple inexpensive device of this character in which the bars aresecurely and pivotally engaged with the frame, one in which the pivotingmembers may be readily disengaged for releasing the bars whencircumstances require, and one wherein said pivoting members will belocked against accidental disengagement by the adjacent teeth-holdingwedges.

A further object of the invention is to provide a simplified means forsecuring the teeth in position upon and for movement with the bars, onewherein the teeth-holding wedges may be readily manipulated for securingor releasing the teeth, and one in which accidental disengagement andloss of the wedges is obviated.

With these and other objects in view the invention comprises the novelfeatures of construction and combination of parts more fully hereinafterdescribed.

In the accompanying drawings, Figure 1 is a top plan view of a harrowembodying the invention. Fig. 2 is a side elevation of the same.

1 Fig. 3 is an enlarged detail view of a portion of the frame and one ofthe terminal teeth. Fig. 4 is a top plan view of the same. Fig. 5 is adetail rear elevation of the parts shown in Fig. 4 as viewed in thedirection ofthe arrow in said figure. Fig. 6 is an enlarged Sideelevation, partly in section, of one of the intermediate teeth, thesection being taken on the line 6 6 of Fig. 1-. Fig. 7 is a plan view ofone of the teeth-holding clips. -Fig. 8 is an elevation of oneof thetooth-locking members or wedges. Fig. 9 is an elevation of one of thebar-pivoting members.

Referring to the drawings, 1 designates the side bars of the harrow, towhich are pivoted for rotation a plurality of tooth-carrying bars 2,equipped with teeth 3 and provided with fixed upwardly-projectingcrank-arms 4, connected at their upper ends with a rigid element or rod5 in turn engaged at its forward end with a pivoted operating-lever 6operable for rotating the tooth-bars 2 for varying the inclination ofthe teeth 3, these parts, except as hereinafter explained, being all ofthe usual or any appropriate construction and material and adapted toperform their ordinary functions.

The teeth 3 are in accordance with the present invention connected tothe U-shaped bars 2, each by means of a U-shaped connecting member orclip 7 and a retaining member or wedge 8, which latter, together withthe tooth, is entered through suitablyshaped openings or slots 9,provided in the clip, said wedge, which has in one of its faces alongitudinal groove or seat 10 designed to receive the adjacent edge ofthe tooth, being provided in its opposite edge with a pair of relativelyspaced recesses 11 and with spaced bearing portions or faces 12, adaptedin operation to engage the adjacent edges of the bar 2, while at theterminals of the wedge there are formed horizontally-projecting engagingportions or ears 13, which facilitate the operation of driving thewedge, it being noted in this connection that the bearing portions 12 ofthe latter are suitably inclined to insure the proper Wedging action forsecurely retaining the tooth in place. In assembling the parts the clip7 is positioned upon the bar 2 at an appropriate point and thewedge 8entered into the slots 9 with the recesses 11 opposite the edges of thebar, the tooth 3 being next entered into the slots and the wedge drivenhome for securing the tooth against movement. It is to be observed inthis connection that the portions or ears 13 not only present extendedsurfaces to sustain the blows of a hammer While driving the wedges, butalso serve in the event of the tooth and wedge becoming loosened toengage with the clip 7 and obviate escape and loss of the wedge.Further, it will be noted that when the wedge is driven up or loosenedfor. turning the tooth or for other purposes the recesses 11 engage theedges of bar 2, thus causing the tooth to become thoroughly loose in theclip, which permits ready removal of the tooth from the clip andobviates the common necessity of driving the tooth out with a hammer orlike tool and consequent battering and damaging the point of the tooth.

The bars 2 are connected with the side bars 1 by means of pivotingmembers or bolts 14, each comprising a cylindrical body portion havingat one end a bearing-head 15, and at its other end with an engagingportion or head 16,-having a front inclined or beveled face 17 and arear bearingportion or face 18, the body of the member 14 being providedat a point in rear of the head 16 and opposite the bearing-face 18 witha recess 19, which, in conjunction with the beveled face 17, facilitatesentrance of the head 16 through the bearingopening in the bar 1.

In practice the pivoting members 14 are entered through suitablebearing-openings in the side bars 1 and seated in the channels of thebars 2, to which latter they are looked through engagement of the wedges8 of the terminal teeth 3 with the bearing-faces 18 of the heads 16, itbeing obvious that the heads 15 will hear at the outer faces of the sidebars 1 and that the cylindrical body portions of the members 14 are freefor rotation in the latter to permit rotation of the tooth-carrying bars2. In assembling the parts the bars 2 are positioned with the pivotingmembers 14 in place, after which the terminal clips 7 are applied to thetooth-bars and the terminal teeth 3 and wedges 8 entered through theslots 9, whereupon when the wedges are driven home they subserve thetwofold function of fixing the teeth and locking the pivoting members tothe bars.

From the foregoing it is apparent that we produce a comparatively simpleinexpensive device of the character described admirably adapted for theattainment of the ends in view, it being understood that minor changesin the details herein set forth may be resorted to without departingfrom thespirit of the invention.

Having thus described our-invention, what we claim is 1. In a harrow, atooth-carrying bar, a clip positioned thereon and provided withopenings, a tooth entered through the openings in the clip, and a wedgeentered through said openings for retaining the tooth in place, saidwedge being provided with terminal-engaging portions and having itsbar-engaging face recessed at spaced intervals.

2. In a harrow, a tooth-carrying bar of substantially U shape incross-section, a clip positioned on the bar and provided withtoothreceiving openings, a tooth entered through said openings, and atooth-retaining wedge also entered in the openings for fixing the toothin place, said wedge beingadapted to bear upon the spaced edges of thebar and having its bearing-faces provided with a pair of recessesdesigned to register with said edges.

3. In aharrow, a toothcarrying bar, a clip positioned on the latter andprovided with tooth-receiving openings, a tooth entered in said openingsand a tooth-retaining wedge also entered through the openings anddesigned to bear upon one face of the bar for fixing the tooth in place,said wedge being provided with projecting portions disposed at oppositesides of the clip.

4. In a harrow, a frame-bar, a tooth-carrying ba-r having a recess, apivoting member entered through the frame-bar and seated in the recess,said member having a head presenting a bearing-face, a clip disposedupon the bar and having tooth-receiving openings, a tooth enteredthrough said openings, and a wedge enteredthrough the clip for fixingthe tooth in place, said wedge being designedfor engagement with thebearing-face to lock the being adapted for interlocking engagement withthe pivoting member to lock the latter to the bar.

6. In a harrow, aframe-bar, a tooth-carrying bar, a pivoting member forsaid tooth-bar, one of the parts having a recess to receive the otherand the other being provided with a bearing-face, aclip positioned onthe bar and having tooth-receiving opening, a tooth entered through saidopening, and a retaining member for fixing the tooth in place, saidretaining member being designed for interlocking engagement with thebearing-face to lock the pivoting member to the tooth-bar.

In testimony whereof we afiix our signatures in presence of twowitnesses.

WILLIAM M. WILLMORE. WILLIAM LOUIS SCHMIDT.

Witnesses:

LOUIS (J. KIRGHHOFF, WALTER R, FOWLER.

